Setup of LG308 & LGT92

Hi,
I bought LG308 and LGT92, both using US915.
After I setup LoRaWAN in LG308 and turn on LGT92. The LGT92 Blink with green light. Unfortunately, I didnot see the lora traffic in LG308 web interface. From System Log, it was said that “Beaconing signal will be emitted at 869525000.”. Is that the reason?. If yes, How Can I change the value?